LS 600h V8-5.0L (2UR-FSE) Hybrid (2008)
Horn: Initial Inspection and Diagnostic Overview
How To Proceed With Troubleshooting
HORN: HORN SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
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Use these procedures to troubleshoot the horn system.
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*: Use the intelligent tester or Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Using the intelligent tester or Techstream, check if the CAN communication system is functioning normally.
Result
B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.
4. PROBLEM SYMPTOMS TABLE
Result
B -- Go to step 6
A -- Continue to next step.
5. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Data List / Active Test See: Data List / Active Test
(b) Terminals of ECU See: Pinout Values and Diagnostic Parameters
NEXT -- Continue to next step.
6. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
7. CONFIRMATION TEST
NEXT -- END
Data List / Active Test
HORN: HORN SYSTEM: DATA LIST / ACTIVE TEST
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT: Using the intelligent tester or Techstream to read the Data List allows the values or states of switches, sensors, actuators and other
items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be
discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.